共 50 条
- [2] FORMAL SOLUTIONS OF A SYSTEM LINEAR DIFFERENTIAL EQUATIONS WITH AN IRREGULAR SINGULAR POINT DOPOVIDI AKADEMII NAUK UKRAINSKOI RSR, 1972, (01): : 29 - &
- [3] Formal solutions of linear differential and difference equations Programmirovanie, (01): : 24 - 42
- [5] A formal theory of linear differential equations (second part). JOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK, 1932, 168 (1/4): : 233 - 252
- [6] On the Summability of Formal Solutions of Linear Partial Differential Equations Journal of Dynamical and Control Systems, 2005, 11 : 389 - 403
- [9] The formal theory of linear differential equations. (First part). JOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK, 1932, 167 : 221 - 234